求翻译：紧凑型管式预聚结器是近年来国外新兴的一种处理含油污水的设备，该设备因其简单的结构、较高的效率和低廉的成本而被广泛用于含油污水处理流程中。但是国内目前仍旧未对其进行深入研究。是什么意思？

Compact tube pre-coalescence is abroad in recent years a new treatment of oily wastewater equipment, the device because of its simple structure, high efficiency and low cost have been widely used in oily wastewater treatment process. But the current is still not its in-depth study.

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Compact tube type coalescer is emerging in recent years abroad in advance of an oily water treatment equipment, the equipment because of its simple structure, high efficiency and low cost are widely used in oily water treatment processes. But China is still not to be studied.

The compact tubular pre-coalescer was the recent years overseas emerging one kind of processing oiliness sewage equipment, this equipment because of its simple structure, the high efficiency and the inexpensive cost widely uses in containing oil in the sewage treatment flow.But domestic still has no